Astreia or Astrea (in classical Greek: Ἀστραῖα is a minor deity; "maiden or virgin of the stars"), in Greek mythology, is the daughter of Zeus and Themis. Both she and her mother are personifications of justice.
She preached wisdom and taught men homemade activities such as hunting, planting, and others. Soon after the Golden Age, she left the Earth so as not to see the suffering that humanity would go through in the coming ages, leaving for the sky, in the form of the constellation of Virgo. The scales she carried became the nearby constellation of Libra.
She is one of the goddesses related to the signs of Libra, Virgo and Gemini, along with Athena, Aphrodite and Apollo.